Wallabies coach Robbie Deans is keeping quiet on who he has chosen to replace injured five-eighth Quade Cooper but says whether it is Berrick Barnes or Kurtley Beale will not make too much difference.

The second-placed Wallabies were flying out on Thursday for their final two Rugby Championship Tests, against the Springboks in Pretoria on Saturday week and against Argentina in Rosario a week later.

Deans said he had decided on a new playmaker after losing Cooper to knee surgery earlier this week but needed to tell his players first.

"The choices are obvious ... we've got Berrick, we've got Kurtley," Deans said at Sydney airport. "Obviously it will be one of the above.

"We've made the decision, we just haven't communicated it yet.

"Our protocol is to talk to the players before we talk to the public."

Barnes, renowned for his reliability, has strong kicking skills more suited for a conservative field-position game while regular full-back Beale is a more explosive, ball-running number 10.

Utility back Barnes' solid performance in his first Test as a full-back in Saturday's 23-19 win over Argentina would have made the decision even tougher.

But Deans insisted his choice was in no way an indication of the style of game he intended to play to continue Australia's recent dominance over the Springboks, winning seven of the past eight contests.

"I don't think it will make a lot of difference either way," he said.

"As you've seen with the way we structure our game, you'll see both players involved in both roles, so it really doesn't matter."

Australia will be looking to save face in its Rugby Championship campaign and can finish second in the series with wins over both the Springboks and the Pumas.

Under-fire coach Deans would also welcome two wins on the road, but asked if it would alleviate any of the pressure on him in the wake of repeated losses to the world number one All Blacks he said: "No I doubt it."

"There's always pressure, but I like the way you're thinking.

"(Two losses would be) more of the same. It's all part of it."

Injured trio Sitaleki Timani (hamstring), Stephen Moore (hamstring) and Dom Shipperley (finger) were all passed fit to travel while Waratahs prop Paddy Ryan and Western Force winger Nick Cummins were the only uncapped players named in the squad.

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